From 0393f324d73479feee10b60e7e30a087f53e2e08 Mon Sep 17 00:00:00 2001
From: Craig Topper <craig.topper@gmail.com>
Date: Sat, 1 Aug 2015 22:52:12 +0000
Subject: [PATCH] Mark CompositeType::getTypeAtIndex as const. NFC

llvm-svn: 243845
---
 include/llvm/IR/DerivedTypes.h |  4 ++--
 lib/IR/Type.cpp                | 12 +++++++-----
 2 files changed, 9 insertions(+), 7 deletions(-)

diff --git a/include/llvm/IR/DerivedTypes.h b/include/llvm/IR/DerivedTypes.h
index 96962da599f..d28847e4ff3 100644
--- a/include/llvm/IR/DerivedTypes.h
+++ b/include/llvm/IR/DerivedTypes.h
@@ -153,8 +153,8 @@ public:
   /// getTypeAtIndex - Given an index value into the type, return the type of
   /// the element.
   ///
-  Type *getTypeAtIndex(const Value *V);
-  Type *getTypeAtIndex(unsigned Idx);
+  Type *getTypeAtIndex(const Value *V) const;
+  Type *getTypeAtIndex(unsigned Idx) const;
   bool indexValid(const Value *V) const;
   bool indexValid(unsigned Idx) const;
 
diff --git a/lib/IR/Type.cpp b/lib/IR/Type.cpp
index 553fa93f585..1b46b7b01cb 100644
--- a/lib/IR/Type.cpp
+++ b/lib/IR/Type.cpp
@@ -620,8 +620,8 @@ StructType *Module::getTypeByName(StringRef Name) const {
 //                       CompositeType Implementation
 //===----------------------------------------------------------------------===//
 
-Type *CompositeType::getTypeAtIndex(const Value *V) {
-  if (StructType *STy = dyn_cast<StructType>(this)) {
+Type *CompositeType::getTypeAtIndex(const Value *V) const {
+  if (auto *STy = dyn_cast<StructType>(this)) {
     unsigned Idx =
       (unsigned)cast<Constant>(V)->getUniqueInteger().getZExtValue();
     assert(indexValid(Idx) && "Invalid structure index!");
@@ -630,14 +630,16 @@ Type *CompositeType::getTypeAtIndex(const Value *V) {
 
   return cast<SequentialType>(this)->getElementType();
 }
-Type *CompositeType::getTypeAtIndex(unsigned Idx) {
-  if (StructType *STy = dyn_cast<StructType>(this)) {
+
+Type *CompositeType::getTypeAtIndex(unsigned Idx) const{
+  if (auto *STy = dyn_cast<StructType>(this)) {
     assert(indexValid(Idx) && "Invalid structure index!");
     return STy->getElementType(Idx);
   }
-  
+
   return cast<SequentialType>(this)->getElementType();
 }
+
 bool CompositeType::indexValid(const Value *V) const {
   if (auto *STy = dyn_cast<StructType>(this)) {
     // Structure indexes require (vectors of) 32-bit integer constants.  In the